CN106656100A - Single-end to double-end differential analog circuit - Google Patents
Single-end to double-end differential analog circuit Download PDFInfo
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- CN106656100A CN106656100A CN201611245806.2A CN201611245806A CN106656100A CN 106656100 A CN106656100 A CN 106656100A CN 201611245806 A CN201611245806 A CN 201611245806A CN 106656100 A CN106656100 A CN 106656100A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/32—Balance-unbalance networks
Abstract
The invention discloses a single-end to double-end differential analog circuit, which comprises a transistor differential cascade amplification/attenuation circuit, an AC compensation circuit, a high-frequency compensation circuit, an emitter following feedback circuit and a constant current source circuit, wherein the transistor differential cascade amplification/attenuation circuit respectively reverse a single-end input signal through different transistors and generates double-end differential positive end and negative end signals, the amplitudes of the double-end differential signals are the same and the phase difference is 180 degrees; DC bias is superposed by an input end at the other end of the transistor differential cascade amplification/attenuation circuit, the AC compensation circuit and the high-frequency compensation circuit respectively provide corresponding AC compensation and high-frequency compensation for the transistor differential cascade amplification/attenuation circuit, common mode voltage is overlapped at an output end of the transistor differential cascade amplification/attenuation circuit through the emitter following feedback circuit, the constant current source circuit provides a constant current source, and the analog circuit controls limit voltage of the output differential signal. The circuit has the advantages of low cost, high cost performance, high device universality and the like.
Description
Technical field
The present invention relates to measuring instrument instrument field, more particularly to a kind of single-ended analog circuit for turning both-end difference.
Background technology
Measuring instrument instrument generally needs have high speed, the input signal disposal ability of high bandwidth, could meet product
Practical application request.And the signal transacting of high speed, high bandwidth, higher requirement is it is also proposed to circuit design.Measuring instrument instrument
Table inside generally carries out digital conversion process using ADC chips to the analog signal being input into, and current high-speed ADC chip is adopted
It is input into both-end difference analogue.But the analog signal of instrument input belongs to single ended input, and this needs exist for a circuit to realize list
The conversion of both-end difference is held, and ensures that signal is undistorted.
Currently, the single-ended circuit function for turning both-end difference, generally using high speed, the integrated transporting discharging of high bandwidth of external import
Chip is realizing.And amplifier chip itself is expensive, and purchase channel is also often limited, and governs to certain limit answering for product
With design and the raising of cost performance.Therefore, a kind of high speed of autonomous Design, high bandwidth, meeting performance requirement single-ended, to turn both-end poor
The analog circuit for dividing, into the task of top priority, and arises.
The content of the invention
It is an object of the invention to overcome the dependence to high speed, high bandwidth integrated transporting discharging chip, ensureing circuit performance
Under the premise of, there is provided a kind of single-ended analog circuit for turning both-end difference, the analog signal of input instrument and meter can be carried out effectively
Conversion, enhanced processing, to meet the mode input signal of late-class circuit.
The technical solution used in the present invention is：
A kind of single-ended analog circuit for turning both-end difference, it includes transistor differential Cascaded amplification/attenuator circuit, AC compensation electricity
Road, high frequency compensation, penetrate with feedback circuit, constant-current source circuit；Transistor differential Cascaded amplification/attenuator circuit is by single ended input
Signal difference Jing different crystals pipe is reverse, generate the anode and negative terminal signal of both-end difference, and both-end differential signal amplitude is identical, phase
Position difference 180 degree；The direct current biasing of single ended signal is input into by the other end of transistor differential Cascaded amplification/attenuator circuit
Endlap adds；Transistor differential Cascaded amplification/attenuator circuit carries out AC compensation, transistor differential cascade by AC compensating network
Amplification/attenuation circuit carries out high frequency compensation by high frequency compensation, and common-mode voltage is superimposed on crystal by penetrating with feedback circuit
The output end of pipe differential cascade amplification/attenuation circuit, constant-current source circuit provides perseverance for transistor differential Cascaded amplification/attenuator circuit
Stream source, analog circuit has the function that the voltage amplitude limit to its output difference signal is controlled.
It also includes input stage parallel connection differential loop, and input stage parallel connection differential loop is parallel to transistor differential cascade and puts
The two ends of greatly/attenuator circuit.
Transistor differential Cascaded amplification/the attenuator circuit includes transistor Q1/Q2/Q3/Q4, and AC compensating network includes
Electric capacity C1/C6/C7, resistance R7/R10/R12, high frequency compensation includes transistor Q5/Q6, and described penetrating includes with feedback circuit
Amplifier U1, transistor Q9, electric capacity C5, resistance R3/R4/R18/R19/R22/R23, constant-current source circuit includes transistor Q7/Q8, electricity
Resistance R14/R16,
Input signal connects the base stage of transistor Q1, and the colelctor electrode of transistor Q1 connects respectively one end and the transistor Q5 of resistance R1
Emitter stage, the other end of resistance R1 connects the base stage of transistor Q3, and the emitter stage of transistor Q1 is connected by adjustable resistance R5
The colelctor electrode of transistor Q8, the emitter stage of transistor Q3 connects the colelctor electrode of transistor Q7 by resistance R8,
Direct current biasing Vbias connects the base stage of transistor Q2 by resistance R30, and the base stage of transistor Q2 is grounded by electric capacity C11,
The colelctor electrode of transistor Q2 connects respectively the emitter stage of one end of resistance R2 and transistor Q6, the other end connection crystal of resistance R2
The base stage of pipe Q4, the emitter stage of Q2 connects the colelctor electrode of transistor Q8 by adjustable resistance R6, and the emitter stage of transistor Q4 passes through
Resistance R9 connects the colelctor electrode of transistor Q7,
The emitter stage of transistor Q1 connects respectively one end of resistance R10 and resistance R12, and the other end of resistance R10 passes through electric capacity C6
The emitter stage of connection transistor Q2, the other end of resistance R12 connects the emitter stage of transistor Q2 by electric capacity C7,
The emitter stage of transistor Q3 passes sequentially through the emitter stage that resistance R7 and electric capacity C1 connects transistor Q4,
The colelctor electrode of transistor Q7 is grounded by electric capacity C2, and the emitter stage of transistor Q7 connects negative power supply by resistance R14, brilliant
The base stage of body pipe Q7 passes through resistance R15 connection control signals CT1,
The colelctor electrode of transistor Q8 is grounded by electric capacity C3, and the emitter stage of transistor Q8 connects negative power supply by resistance R16, brilliant
The base stage of body pipe Q8 passes through resistance R17 connection control signals CT2,
The positive output end of the current collection of Q3 extremely transistor differential Cascaded amplification/attenuator circuit, the colelctor electrode connection of transistor Q3 is brilliant
The colelctor electrode of body pipe Q6, the base earth of transistor Q6,
The negative output terminal of the current collection of Q4 extremely transistor differential Cascaded amplification/attenuator circuit, the colelctor electrode connection of transistor Q4 is brilliant
The colelctor electrode of body pipe Q5, the base earth of transistor Q5,
Common-mode voltage VCM connects the positive input terminal of amplifier U1 by R19, and the positive input terminal of amplifier U1 is grounded by electric capacity C4, transports
The output end for putting U1 connects the base stage of transistor Q9 by resistance R18, and the negative input end of amplifier U1 connects respectively resistance R22, electricity
One end of resistance R23 and electric capacity C5, the other end of resistance R22 connects the colelctor electrode of Q3, and the other end of resistance R23 connects the current collection of Q4
Pole, the other end of electric capacity C5 connects the base stage of transistor Q9, and the base stage of transistor Q9 connects cathode power supply by resistance R21, brilliant
The colelctor electrode of body pipe Q9 connects cathode power supply by resistance R20, and the emitter stage of transistor Q9 connects the current collection of Q4 by resistance R3
Pole, the emitter stage of transistor Q9 connects the colelctor electrode of Q3 by resistance R4.
Input stage parallel connection differential loop includes transistor Q10/Q11/Q12, electric capacity C8/C9, resistance R24/R25/R26/
R27/R28；The base stage of transistor Q10 connects the base stage of transistor Q1, and the colelctor electrode of transistor Q10 connects the current collection of transistor Q1
Pole, the base stage of transistor Q11 connects the base stage of transistor Q2, and the colelctor electrode of transistor Q11 connects the colelctor electrode of transistor Q2, brilliant
The emitter stage of body pipe Q10 connects the colelctor electrode of transistor Q12 by resistance R24, and the emitter stage of transistor Q11 passes through resistance R25
The colelctor electrode of connection transistor Q12, the emitter stage of transistor Q10 passes sequentially through resistance R26 and electric capacity C8 connection transistor Q11's
Emitter stage, the emitter stage of transistor Q10 passes sequentially through the emitter stage that resistance R27 and electric capacity C9 connects transistor Q11, transistor
The colelctor electrode of Q12 is grounded by electric capacity C10, and the emitter stage of transistor Q12 connects negative power supply, transistor Q12 by resistance R28
Base stage pass through resistance R29 connection control signals CT3.
The cathode power supply and negative power supply choose different magnitudes of voltage according to the difference of late-class circuit.
The common-mode voltage is matched with rear class difference channel input.
Analog circuit is by the base stage DC potential of adjustment transistor Q5/Q6, resistance R20, cathode power supply and direct current biasing
The value of Vbias changes the voltage amplitude of corresponding both-end differential signal, to match late-class circuit（ADC chips）Required difference
Input voltage amplitude, improves output compatibility.
The transistor includes NPN triode, PNP triode, PMOS, NMOS and JFET.
The present invention adopts above technical scheme, compared with existing integrated operational amplifier circuit, discrete, single-ended turn proposed by the present invention
The cost of both-end difference channel is substantially reduced, and circuit performance also can be ensured on an equal basis, and device versatility is high, purchase channel also compared with
Flexibly, it is controllable so that circuit is in, have higher cost performance in the instrument product application of low side design and apply valency
Value.
Description of the drawings
The present invention is described in further details below in conjunction with the drawings and specific embodiments；
Fig. 1 is a kind of basic schematic of the single-ended analog circuit for turning both-end difference of the present invention；
Fig. 2 is a kind of expansion schematic diagram of the single-ended analog circuit for turning both-end difference of the present invention.
Specific embodiment
As shown in Figure 1 or 2, the present invention discloses a kind of single-ended analog circuit for turning both-end difference, and it includes that transistor is poor
Classification connection amplification/attenuation circuit, AC compensating network, high frequency compensation, penetrate with feedback circuit, constant-current source circuit；Transistor
It is reverse, generation both-end difference that single ended signal SIG_IN is distinguished Jing different crystals pipe by differential cascade amplification/attenuation circuit
Anode and negative terminal signal, both-end differential signal amplitude is identical, phase 180 degree；The direct current of single ended signal SIG_IN is inclined
Put and be superimposed by the other end input of transistor differential Cascaded amplification/attenuator circuit；Transistor differential Cascaded amplification/decay electricity
Road carries out AC compensation by AC compensating network, and transistor differential Cascaded amplification/attenuator circuit is entered by high frequency compensation
Row high frequency compensation, common-mode voltage passes through to penetrate the output end that transistor differential Cascaded amplification/attenuator circuit is superimposed on feedback circuit,
Constant-current source circuit provides constant-current source, electricity of the analog circuit to output difference signal for transistor differential Cascaded amplification/attenuator circuit
Pressure amplitude limit is controlled.
As shown in Fig. 2 it also includes input stage parallel connection differential loop, it is poor that input stage parallel connection differential loop is parallel to transistor
The two ends of classification connection amplification/attenuation circuit.
Transistor differential Cascaded amplification/the attenuator circuit includes transistor Q1/Q2/Q3/Q4, and AC compensating network includes
Electric capacity C1/C6/C7, resistance R7/R10/R12, high frequency compensation includes transistor Q5/Q6, and described penetrating includes with feedback circuit
Amplifier U1, transistor Q9, electric capacity C5, resistance R3/R4/R18/R19/R22/R23, constant-current source circuit includes transistor Q7/Q8, electricity
Resistance R14/R16,
Input signal SIG_IN connects the base stage of transistor Q1, and the colelctor electrode of transistor Q1 connects respectively one end and the crystalline substance of resistance R1
The emitter stage of body pipe Q5, the other end of resistance R1 connects the base stage of transistor Q3, and the emitter stage of transistor Q1 passes through adjustable resistance
R5 connects the colelctor electrode of transistor Q8, and the emitter stage of transistor Q3 connects the colelctor electrode of transistor Q7 by resistance R8,
Direct current biasing Vbias connects the base stage of transistor Q2 by resistance R30, and the base stage of transistor Q2 is grounded by electric capacity C11,
The colelctor electrode of transistor Q2 connects respectively the emitter stage of one end of resistance R2 and transistor Q6, the other end connection crystal of resistance R2
The base stage of pipe Q4, the emitter stage of Q2 connects the colelctor electrode of transistor Q8 by adjustable resistance R6, and the emitter stage of transistor Q4 passes through
Resistance R9 connects the colelctor electrode of transistor Q7,
The emitter stage of transistor Q1 connects respectively one end of resistance R10 and resistance R12, and the other end of resistance R10 passes through electric capacity C6
The emitter stage of connection transistor Q2, the other end of resistance R12 connects the emitter stage of transistor Q2 by electric capacity C7,
The emitter stage of transistor Q3 passes sequentially through the emitter stage that resistance R7 and electric capacity C1 connects transistor Q4,
The colelctor electrode of transistor Q7 is grounded by electric capacity C2, the emitter stage of transistor Q7 by resistance R14 connect negative power supply-
The base stage of VCC, transistor Q7 passes through resistance R15 connection control signals CT1,
The colelctor electrode of transistor Q8 is grounded by electric capacity C3, the emitter stage of transistor Q8 by resistance R16 connect negative power supply-
The base stage of VCC, transistor Q8 passes through resistance R17 connection control signals CT2,
The positive output end SIG_OUT_P of the current collection of Q3 extremely transistor differential Cascaded amplification/attenuator circuit, the current collection of transistor Q3
The colelctor electrode of pole connection transistor Q6, the base earth of transistor Q6,
The negative output terminal SIG_OUT_N of the current collection of Q4 extremely transistor differential Cascaded amplification/attenuator circuit, the current collection of transistor Q4
The colelctor electrode of pole connection transistor Q5, the base earth of transistor Q5,
Common-mode voltage VCM connects the positive input terminal of amplifier U1 by R19, and the positive input terminal of amplifier U1 is grounded by electric capacity C4, transports
The output end for putting U1 connects the base stage of transistor Q9 by resistance R18, and the negative input end of amplifier U1 connects respectively resistance R22, electricity
One end of resistance R23 and electric capacity C5, the other end of resistance R22 connects the colelctor electrode of Q3, and the other end of resistance R23 connects the current collection of Q4
Pole, the other end of electric capacity C5 connects the base stage of transistor Q9, the base stage of transistor Q9 by resistance R21 connect cathode power supply+
The colelctor electrode of VCC, transistor Q9 connects cathode power supply+VCC by resistance R20, and the emitter stage of transistor Q9 is connected by resistance R3
The colelctor electrode of Q4 is connect, the emitter stage of transistor Q9 connects the colelctor electrode of Q3 by resistance R4.
As shown in Fig. 2 input stage parallel connection differential loop includes transistor Q10/Q11/Q12, electric capacity C8/C9, resistance R24/
R25/R26/R27/R28；The base stage of transistor Q10 connects the base stage of transistor Q1, the colelctor electrode connection transistor of transistor Q10
The colelctor electrode of Q1, the base stage of transistor Q11 connects the base stage of transistor Q2, the colelctor electrode connection transistor Q2's of transistor Q11
Colelctor electrode, the emitter stage of transistor Q10 connects the colelctor electrode of transistor Q12 by resistance R24, and the emitter stage of transistor Q11 leads to
The colelctor electrode that resistance R25 connects transistor Q12 is crossed, the emitter stage of transistor Q10 passes sequentially through resistance R26 and electric capacity C8 connection crystalline substances
The emitter stage of body pipe Q11, the emitter stage of transistor Q10 passes sequentially through the transmitting that resistance R27 and electric capacity C9 connects transistor Q11
Pole, the colelctor electrode of transistor Q12 is grounded by electric capacity C10, the emitter stage of transistor Q12 by resistance R28 connect negative power supply-
The base stage of VCC, transistor Q12 passes through resistance R29 connection control signals CT3.
Cathode power supply+the VCC and negative power supply-VCC chooses different magnitudes of voltage according to the difference of late-class circuit.
The common-mode voltage is matched with rear class difference channel input.
Analog circuit is by the base stage DC potential of adjustment transistor Q5/Q6, resistance R20, cathode power supply and direct current biasing
The value of Vbias changes the voltage amplitude of corresponding both-end differential signal, to match late-class circuit（ADC chips）Required difference
Input voltage amplitude, improves output compatibility.
The transistor includes NPN triode, PNP triode, PMOS, NMOS and JFET.
Below just the operation principle of the present invention elaborates：
The present invention is applied to high speed, high bandwidth, single-ended turns both-end using the discrete device such as common transistor, capacitance-resistance composition is a kind of
The analog circuit of difference, as shown in figure 1, transistor Q1/Q3, Q2/Q4 composition differential cascade amplification/attenuation circuit, will be single-ended defeated
Enter the secondary counter of signal SIG_IN Jing transistor Q1/Q3 backward, the positive end signal of both-end difference is generated, by single ended signal
SIG_IN Jing transistor Q2/Q4 once reversely after, generate the negative terminal signal of both-end difference, the both-end differential signal amplitude of output
Identical, phase 180 degree；Wherein the Frequency Response of transistor Q1/Q3, Q2/Q4, affects bandwidth, the frequency response of integrated circuit；
Circuit adjustable resistance R3/R5/R8, R4/R6/R9 are combined, and realize amplification or decay of the circuit to input signal SIG_IN.
The base stage input superposition that the direct current biasing Vbias of single ended signal SIG_IN passes through transistor Q2.
By adjusting R7/C1, R10/C6, R12/C7（Specific to the circuit of Fig. 2, also including R26/C8, R27/C9）Composition
Alternating current compensating network and Q5/Q6 transistors composition high frequency compensation, improve bandwidth, the frequency response of integrated circuit.
The present invention is penetrated with feedback circuit by the combination such as R19, U1, R18, Q9, C5, R3/R4, R22/R23, in difference output
Endlap adds the common-mode voltage matched with rear class difference channel input（VCM）；So that output both-end differential signal is without the need for again
Process, can directly input and be processed to rear class ADC chip, improve output compatibility.
The constant-current source circuit of Q7, Q8, R14, R16 under the control of control signal CT1, CT2, by changing R14, R16
Resistance, the operating current for changing transistor Q1～Q6（In the same manner, the R28 resistances in Fig. 2 determine the operating current of Q10, Q11）,
Changing affects the work frequency response of transistor, so as to affect bandwidth, the frequency response of integrated circuit.
To change integrated circuit amplification/attenuation coefficient adjustment ability, the two of transistor differential Cascaded amplification/attenuator circuit
One group of input stage parallel connection differential loop being made up of Q10, Q11, R24, R25, Q12, R28, R26/C8, R27/C9 etc. is held, then is led to
Cross CT1, CT2, CT3 combination control, change differential cascade circuit amplification/attenuation coefficient so that integrated circuit can be with spirit
Ground living is amplified to input signal SIG_IN or decays.
By adjusting Q5/Q6 base stage DC potentials, R20 ,+VCC, Vbias, can accordingly change the differential electrical of output end
Pressure amplitude degree, realizes circuit to output end difference（Differential mode）The amplitude limit control of voltage, to match late-class circuit（ADC chips）Required
Differential input voltage amplitude, improves output compatibility.
In sum, by discrete device proposed by the present invention constitute it is single-ended turn both-end differential analog circuitry, with into
This low, circuit performance ensures on an equal basis（Cost performance is high）, device versatility it is high（Purchase channel is flexible, controllable）The advantages of.In reality
Using in, circuit overall performance indications meet in, the application design requirement of low side instrument product, meet expected design, have
There is higher cost performance and using value.Certainly the specific embodiment, those skilled in the art be the invention is not limited in
Known general replacement is also covered by within the scope of the present invention.
Claims (8)
1. a kind of single-ended analog circuit for turning both-end difference, it is characterised in that：It includes transistor differential Cascaded amplification/decay electricity
Road, AC compensating network, high frequency compensation, penetrate with feedback circuit, constant-current source circuit；Transistor differential Cascaded amplification/decay
Circuit is distinguished the anode and negative terminal signal that Jing different crystals pipe is reverse, generate both-end difference, both-end difference by single ended signal
Signal amplitude is identical, phase 180 degree；The direct current biasing of single ended signal passes through transistor differential Cascaded amplification/decay
The other end input superposition of circuit；Transistor differential Cascaded amplification/attenuator circuit carries out exchange benefit by AC compensating network
Repay, transistor differential Cascaded amplification/attenuator circuit carries out high frequency compensation by high frequency compensation, and common-mode voltage is by penetrating with anti-
Current feed circuit is superimposed on the output end of transistor differential Cascaded amplification/attenuator circuit, and constant-current source circuit is that transistor differential cascade is put
Greatly/attenuator circuit provides constant-current source, and analog circuit has the function that the voltage amplitude limit to its output difference signal is controlled.
2. a kind of single-ended analog circuit for turning both-end difference according to claim 1, it is characterised in that：It also includes input stage
Differential loop in parallel, input stage parallel connection differential loop is parallel to the two ends of transistor differential Cascaded amplification/attenuator circuit.
3. a kind of single-ended analog circuit for turning both-end difference according to claim 1 or claim 2, it is characterised in that：The transistor
Differential cascade amplification/attenuation circuit includes transistor Q1/Q2/Q3/Q4, and AC compensating network includes electric capacity C1/C6/C7, resistance
R7/R10/R12, high frequency compensation includes transistor Q5/Q6, and described penetrating includes amplifier U1, transistor Q9, electricity with feedback circuit
Hold C5, resistance R3/R4/R18/R19/R22/R23, constant-current source circuit includes transistor Q7/Q8, resistance R14/R16,
Input signal connects the base stage of transistor Q1, and the colelctor electrode of transistor Q1 connects respectively one end and the transistor Q5 of resistance R1
Emitter stage, the other end of resistance R1 connects the base stage of transistor Q3, and the emitter stage of transistor Q1 is connected by adjustable resistance R5
The colelctor electrode of transistor Q8, the emitter stage of transistor Q3 connects the colelctor electrode of transistor Q7 by resistance R8,
Direct current biasing Vbias connects the base stage of transistor Q2 by resistance R30, and the base stage of transistor Q2 is grounded by electric capacity C11,
The colelctor electrode of transistor Q2 connects respectively the emitter stage of one end of resistance R2 and transistor Q6, the other end connection crystal of resistance R2
The base stage of pipe Q4, the emitter stage of Q2 connects the colelctor electrode of transistor Q8 by adjustable resistance R6, and the emitter stage of transistor Q4 passes through
Resistance R9 connects the colelctor electrode of transistor Q7,
The emitter stage of transistor Q1 connects respectively one end of resistance R10 and resistance R12, and the other end of resistance R10 passes through electric capacity C6
The emitter stage of connection transistor Q2, the other end of resistance R12 connects the emitter stage of transistor Q2 by electric capacity C7,
The emitter stage of transistor Q3 passes sequentially through the emitter stage that resistance R7 and electric capacity C1 connects transistor Q4,
The colelctor electrode of transistor Q7 is grounded by electric capacity C2, and the emitter stage of transistor Q7 connects negative power supply by resistance R14, brilliant
The base stage of body pipe Q7 passes through resistance R15 connection control signals CT1,
The colelctor electrode of transistor Q8 is grounded by electric capacity C3, and the emitter stage of transistor Q8 connects negative power supply by resistance R16, brilliant
The base stage of body pipe Q8 passes through resistance R17 connection control signals CT2,
The positive output end of the current collection of Q3 extremely transistor differential Cascaded amplification/attenuator circuit, the colelctor electrode connection of transistor Q3 is brilliant
The colelctor electrode of body pipe Q6, the base earth of transistor Q6,
The negative output terminal of the current collection of Q4 extremely transistor differential Cascaded amplification/attenuator circuit, the colelctor electrode connection of transistor Q4 is brilliant
The colelctor electrode of body pipe Q5, the base earth of transistor Q5,
Common-mode voltage VCM connects the positive input terminal of amplifier U1 by R19, and the positive input terminal of amplifier U1 is grounded by electric capacity C4, transports
The output end for putting U1 connects the base stage of transistor Q9 by resistance R18, and the negative input end of amplifier U1 connects respectively resistance R22, electricity
One end of resistance R23 and electric capacity C5, the other end of resistance R22 connects the colelctor electrode of Q3, and the other end of resistance R23 connects the current collection of Q4
Pole, the other end of electric capacity C5 connects the base stage of transistor Q9, and the base stage of transistor Q9 connects cathode power supply by resistance R21, brilliant
The colelctor electrode of body pipe Q9 connects cathode power supply by resistance R20, and the emitter stage of transistor Q9 connects the current collection of Q4 by resistance R3
Pole, the emitter stage of transistor Q9 connects the colelctor electrode of Q3 by resistance R4.
4. a kind of single-ended analog circuit for turning both-end difference according to claim 3, it is characterised in that：The input stage is in parallel
Differential loop includes transistor Q10/Q11/Q12, electric capacity C8/C9, resistance R24/R25/R26/R27/R28；The base of transistor Q10
Pole connects the base stage of transistor Q1, and the colelctor electrode of transistor Q10 connects the colelctor electrode of transistor Q1, and the base stage of transistor Q11 connects
The base stage of transistor Q2 is connect, the colelctor electrode of transistor Q11 connects the colelctor electrode of transistor Q2, and the emitter stage of transistor Q10 passes through
Resistance R24 connects the colelctor electrode of transistor Q12, and the emitter stage of transistor Q11 connects the current collection of transistor Q12 by resistance R25
Pole, the emitter stage of transistor Q10 passes sequentially through the emitter stage that resistance R26 and electric capacity C8 connects transistor Q11, transistor Q10's
Emitter stage passes sequentially through the emitter stage that resistance R27 and electric capacity C9 connects transistor Q11, and the colelctor electrode of transistor Q12 passes through electric capacity
C10 is grounded, and the emitter stage of transistor Q12 connects negative power supply by resistance R28, and the base stage of transistor Q12 is connected by resistance R29
Connect control signal CT3.
5. a kind of single-ended analog circuit for turning both-end difference according to claim 4, it is characterised in that：The cathode power supply and
Negative power supply chooses different magnitudes of voltage according to the difference of late-class circuit.
6. a kind of single-ended analog circuit for turning both-end difference according to claim 1, it is characterised in that：The common-mode voltage with
Rear class difference channel input is matched.
7. a kind of single-ended analog circuit for turning both-end difference according to claim 1, it is characterised in that：Analog circuit is by adjusting
The value of the base stage DC potential of whole transistor Q5/Q6, resistance R20, cathode power supply and direct current biasing Vbias changes corresponding double
The voltage amplitude of end differential signal.
8. a kind of single-ended analog circuit for turning both-end difference according to claim 1, it is characterised in that：The transistor includes
NPN triode, PNP triode, PMOS, NMOS and JFET.
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| CN201611245806.2A CN106656100B (en) | 2016-12-29 | 2016-12-29 | A kind of single-ended analog circuit for turning both-end difference |
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| CN201611245806.2A CN106656100B (en) | 2016-12-29 | 2016-12-29 | A kind of single-ended analog circuit for turning both-end difference |
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| CN110225425A (en) * | 2019-07-09 | 2019-09-10 | 深圳市中科蓝讯科技有限公司 | A kind of microphone input circuit |
| CN110806522A (en) * | 2019-11-12 | 2020-02-18 | 天津津航计算技术研究所 | Arc signal detection conditioning circuit |
| CN112737545A (en) * | 2020-12-24 | 2021-04-30 | 南京邮电大学 | Numerical control attenuator controlled by ADC |
| CN113098484A (en) * | 2021-04-02 | 2021-07-09 | 南方科技大学 | Single-end to differential circuit |
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| CN110225425A (en) * | 2019-07-09 | 2019-09-10 | 深圳市中科蓝讯科技有限公司 | A kind of microphone input circuit |
| CN110806522A (en) * | 2019-11-12 | 2020-02-18 | 天津津航计算技术研究所 | Arc signal detection conditioning circuit |
| CN110806522B (en) * | 2019-11-12 | 2022-02-22 | 天津津航计算技术研究所 | Arc signal detection conditioning circuit |
| CN112737545A (en) * | 2020-12-24 | 2021-04-30 | 南京邮电大学 | Numerical control attenuator controlled by ADC |
| CN112737545B (en) * | 2020-12-24 | 2022-10-21 | 南京邮电大学 | Numerical control attenuator controlled by ADC |
| CN113098484A (en) * | 2021-04-02 | 2021-07-09 | 南方科技大学 | Single-end to differential circuit |
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